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1 <br />PROJECT: San Luis FEATURE: BOREHOLE PERMEABtLl7Y iESi <br />JOB No.: 14702 DATE: 10/25/88 <br />LAB No.: 1.356.13 BOREHOLE: 088-63 <br />1 <br />1 <br /> <br /> <br />1 <br />1 <br />1 <br /> <br /> <br /> <br />1 <br /> <br /> <br /> <br />1 <br />FALLING HEAD METHOD INSIDE A PIEZOMETER STANDPIPE <br />PIPE I.D.: 1.91 cm PIPE AREA: <br />INITIAL HT. TO PATER (angle): 23.42 feet CORR. HT. <br />HT. TO VATER ADDED FOR TEST 6.63 feet 70 PATER: <br /> <br />TOTAL DEPTH OF HOLE: 191 <br />00 feet CORR. DEP. <br />DIAMETER OF BOREHOLE: ; cm <br /> <br />2,85 cni2 I L ~1 <br />~i (7 ~( <br />15.44 fee[ <br />137.20 feet <br />BOREHOLE INCLINATION: •50.00 degrees from horizontal <br />LENGTH OF PIPE STICKUP: 7.92 feet above grand surface <br />TOP OF PIPE TO GROUND: 1.42 vertical feet above ground surface <br />HOR 12- DIST. T.O.P. TO GROUND 7.33 horizontal feet from top of pipe <br />to ground <br />Note: Measurements made from the top of pipe <br />Date Time Increment Total <br />Elapsed Elapsed <br />M D Y lime Time <br />00/00/00 (Hrs.) (Sec.) (Sec-) <br />10/25/88 7.92 <br />10/25/88 7.93 30 30 <br />10/25/88 7.93 30 60 <br />10/25/88 7.95 60 120 <br />10/25/88 7.98 120 240 <br />10/ZS/88 8.05 240 480 <br />70/25/88 8.17 420 900 <br />10/25/88 8.42 900 7,800 <br />10/25/88 8.92 1,800 3,600 <br />10/25/88 9-92 3,600 7,200 <br />70/25/88 10.52 2,160 9,360 <br />10/25/88 15-62 18,360 27,T20 <br />70/25/88 16.53 3,270 30,990 <br />~~~, <br />~'~` <br /> PERMEA8I LI T'! <br />Inclined Corrected CorrettedChange in Increm. Cum. <br />Voter Voter Depth to Ht- of Perm- Perm- <br />Level Level Mater Voter ability ability <br />Reading Reading K C <br />(Ft-) (Ft-) (Ft.) (Ft•) (cm/sec) (cm/aec) <br /> 0.00 <br />6.63 4.71 3.38 <br />6.65 4.75 3.40 0.01 1.5E-07 1.5E-07 <br />6.67 4.75 3.41 0.02 1.5E-07 7.5E-08 <br />6.69 4.77 3.43 0.01 7-SE-OB 3.7E-OB <br />6.71 4.79 3.44 0.01 3.7E-08 1.9E-OB <br />6.81 4.90 3.52 0.07 9.4E-OS 4.7E-08 <br />7.00 5.08 3.65 0.13 9.6E-08 4.5E-OB <br />7.42 5.50 3.95 0.3D~ 1.0E-07 S-OE-08 <br />8.17 6.25 4.49 0.54 9.0E-08 4.5E-OB <br />9.50 7.58 S.GS 0.96 B.tE•OB 4.0E-08 <br />10.21 8.29 5.96 0.51 7.2E-08 1.7E-08 ] (.. 1. <br />14.88 12.96 9.31 3.35 5.7E-08 3.7E=08., <br />h / <br />15.54 13.63 9.79 0.48 4.bE•08 \ <br />~ <br />4.9E-09 i <br />Note: Permeability calculations peformed using the following formula: <br /> =Diameter, Intake, cm <br />d =Diameter, Standpipe <br />L =Length, Intake <br />{ =Time, sec <br />~{ = Piexanetric Need <br />_~ ~~ <br />d2lr,(2mL1 H. <br />` °- In - <br />Reference: 11in[erkorn, Hans F. end Fang, Xsai-Yang (1975)- Foundation Engineering Handbook, <br />Ven Nostranad Reinhold Canpeny, New York, 32 p. <br />